python3-pygit2 is broken in openSUSE Leap 15.6 because it has an unsatisfied
runtime dependency on cffi>=1.16 (Leap only has 1.13.2). I detected this
because pagure workers are crashing now on code.opensuse.org ever since pygit2
was upgraded (August 17 according to rpm).

The traceback looks like this:

Aug 21 11:28:42 pagure01 celery[5426]: Traceback (most recent call last):
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/celery/app/trace.py", line 412, in trace_task
Aug 21 11:28:42 pagure01 celery[5426]:     R = retval = fun(*args, **kwargs)
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/celery/app/trace.py", line 704, in
__protected_call__
Aug 21 11:28:42 pagure01 celery[5426]:     return self.run(*args, **kwargs)
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pagure/lib/tasks_utils.py", line 36, in
decorated_function
Aug 21 11:28:42 pagure01 celery[5426]:     return function(self, session,
*args, **kwargs)
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pagure/lib/tasks.py", line 117, in
generate_gitolite_acls
Aug 21 11:28:42 pagure01 celery[5426]:     helper =
pagure.lib.git_auth.get_git_auth_helper()
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pagure/lib/git_auth.py", line 80, in
get_git_auth_helper
Aug 21 11:28:42 pagure01 celery[5426]:     cls = classes[backend].load()
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2442, in
load
Aug 21 11:28:42 pagure01 celery[5426]:     self.require(*args, **kwargs)
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2465, in
require
Aug 21 11:28:42 pagure01 celery[5426]:     items = working_set.resolve(reqs,
env, installer, extras=self.extras)
Aug 21 11:28:42 pagure01 celery[5426]:   File
"/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 791, in
resolve
Aug 21 11:28:42 pagure01 celery[5426]:     raise VersionConflict(dist,
req).with_context(dependent_req)
Aug 21 11:28:42 pagure01 celery[5426]: pkg_resources.ContextualVersionConflict:
(cffi 1.13.2 (/usr/lib64/python3.6/site-packages),
Requirement.parse('cffi>=1.16.0'), {'pygit2'})

This breakage is the result of this commit in pygit2 (part of 1.14.0 release):
https://github.com/libgit2/pygit2/commit/aab211a842b17c8b699b2753301abb3a9ba7f1ad#diff-4d7c51b1efe9043e44439a949dfd92e5827321b34082903477fd04876edb7552